Question

4.) Find the accelerations (magnitude and direction) of each of the following systems. Show your work...

4.) Find the accelerations (magnitude and direction) of each of the following systems. Show your work for credit. [That is at bare minimum: (i) draw appropriate free body diagrams; (ii) write down Newton's second law; (iii) solve the resulting equation(s) to find the acceleration.]

c.) A block of mass 10 kg hanging from a spring with spring constant ks= 1000 N / m that is attached to the roof of a moving elevator and is stretched 5 cm beyond its equilibrium length.

d.) a block of mass 10 kg that is being pulled north with a force of 20 Newton direction a an angle of 30° below the horizontal. The block is on a horizontal surface with coefficient of kinetic friction  μs = 0.2.

e.) A block of mass 10 kg that is being pulled north with a force of 30 Newton directed at an angle of 30° below the horizontal. The block is on a horizontal surface with coefficient of kinetic friction μk = 0.1 and coefficient of static friction μs = 0.2.

f.) Two 5 kg blocks connected by a rope with the easter-most block being pulled east by a horizontal force of 20 Newtons. The blocks are on a horizontal surface with coefficient of kinetic friction μk = 0.1 and the coefficient of static friction μs = 0.2.

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